7.—(1) An authorised officer who has procured a sample under section 29 (procurement of samples) of the Act for the purposes mentioned in regulation 3 and who considers it should be analysed will divide the sample into three parts.
(2) If the sample consists of sealed containers and opening them would, in the opinion of the authorised officer, impede a proper analysis, the authorised officer will divide the sample into parts by putting the containers into three lots, and each lot will be treated as being a part.
(3) The authorised officer will–
(a)if necessary, place each part in a suitable container and seal it;
(b)mark each part or container;
(c)as soon as reasonably practicable, give one part to the owner and notify the owner in writing that the sample will be analysed;
(d)submit one part for analysis in accordance with section 30 (analysis etc. of samples) of the Act; and
(e)retain one part for future submission under regulation 8.